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Innovative Air Quality Solutions
Binh Duong Province, Vietnam
Qualified Manufacturing Partner — Non-China Volume Production

Vietnam Volume Production Base

Tariff-Resilient Country of Origin, In-House Motor Manufacturing & Western Retail Compliance

A Vietnam-incorporated manufacturing partner within the HisoAir network, in volume production since 2021 with the United States as its primary export market. Motors, injection moulding, final assembly and packaging are completed on site — substantive manufacturing, not transshipment.

PRIMARY FACILITY ROLE
Non-China Volume Production & Final Assembly
VERTICAL INTEGRATION
In-House Motor Manufacturing — Stator Winding & Assembly
COMPLIANCE POSTURE
ISO 9001 Certified · amfori BSCI Audited
Discuss Vietnam Production → →View Real Factory Evidence
Air purifier assembly line at HisoAir partner manufacturing facility in Binh Duong Province, Vietnam
Facility View: Partner volume production base and reliability testing laboratories, Binh Duong Province, Vietnam.
COUNTRY OF ORIGIN & SUPPLY RESILIENCE

Why This Facility

Binh Duong sits within Vietnam's most developed industrial corridor, an hour from Ho Chi Minh City and its deep-water port network. For brands managing tariff exposure, the value here is not lower cost — it is a genuine alternative country of origin backed by on-site component manufacturing.

Role 01

Tariff-Resilient Country of Origin

A Vietnam-incorporated entity in continuous volume production since 2021, with the United States as its primary export market. Country of origin is supported by substantive local manufacturing rather than final-stage assembly of imported kits.

Role 02

Vertical Integration Through In-House Motors

An adjacent motor plant operates stator production and motor assembly lines on site. For air movement products, the motor is the highest-value component — manufacturing it locally strengthens both origin substantiation and lead-time control.

Role 03

Proven Export Track Record

Four consecutive years shipping air treatment appliances to North American customers. Export documentation, HS classification history and origin declarations are established practice here, not a first-time exercise on your program.

Role 04

Audit-Ready for Western Retail

ISO 9001 quality management and amfori BSCI social compliance auditing, supported by ERP, MES and WMS systems that produce the traceability records major retail buyers request during vendor onboarding.

INTEGRATED PRODUCTION DISCIPLINES

Core Capabilities

This facility's contribution to the HisoAir network is origin integrity and volume reliability — the disciplines that determine whether a program survives customs scrutiny and a retail buyer's vendor audit.

Motor stator winding line at partner manufacturing facilityIndustrial Design & Product Definition
Capability 01

In-House Motor Manufacturing

Dedicated stator production and motor assembly lines operating on site, supplying the highest-value component in air movement and air purification platforms from within the country of manufacture.

Multi-line final assembly floor for air treatment appliancesIndustrial Design & Product Definition
Capability 02

Volume Assembly & Line Management

Multiple parallel assembly lines with in-line functional test fixtures, line balancing under MES control, and dedicated operator training before each new program ramp.

Environmental and mechanical reliability testing equipmentIndustrial Design & Product Definition
Capability 03

Reliability & Safety Testing

On-site temperature and humidity chambers, salt spray, plastic flammability, drop, vibration, cord flexing, terminal pull and carton compression testing — the durability and safety evidence North American and EU certification bodies require.

Acoustic test room and sealed CADR test chamberIndustrial Design & Product Definition
Capability 04

Acoustic & CADR Validation

Dedicated noise test room and sealed CADR chamber on site, plus product life test rooms running continuous endurance cycles on purifier and heater platforms.

Production floor operators working with MES terminalsIndustrial Design & Product Definition
Capability 05

Digital Manufacturing Systems

An integrated ERP backbone linking MES, WMS, PLM and SRM. Component lot traceability, work order status and inbound supplier quality are recorded in system rather than on paper — uncommon at this facility size in the region.

Incoming quality inspection station with measurement instrumentsIndustrial Design & Product Definition
Capability 06

Quality & Social Compliance

A quality function covering IQC, IPQC, QA and an in-house laboratory, reporting independently of production. Operating under ISO 9001 with amfori BSCI social compliance auditing for retail vendor onboarding.

MANUFACTURING VERIFICATION & E-E-A-T

Quality, Verification & E-E-A-T

Empirical verification and transparent supplier governance form the backbone of our manufacturing management.

● SITE VERIFICATION DOSSIER
MANUFACTURING RELATIONSHIP
Qualified Manufacturing Partner — Vietnam Volume Production
COUNTRY OF ORIGIN
Vietnam — locally incorporated entity, in volume production since 2021, with on-site motor manufacturing
AUDITED & VERIFIED BY
HisoAir Supply Chain & Engineering Team
LAST SITE REVIEW
2026/1
QUALITY SYSTEM GOVERNANCE
ISO 9001 certified quality management system with a quality function structurally independent of production. amfori BSCI social compliance audited; certificate and audit references available under NDA.
DOCUMENTATION ACCESS
Facility audit summaries, certificate references, origin documentation and lot-level traceability records available for qualified programs under NDA.

Standard Quality Control Process

Unified 6-stage quality assurance protocol deployed across all partner manufacturing facilities, mapped here to the facility's own seven-checkpoint inspection sequence.
01
Supplier Qualification
Component vendor audit and approval managed through SRM, with locally sourced parts qualified against the same criteria as imported ones.
02
Incoming Inspection (IQC)
Over 60 inspection items applied to incoming materials, with AQL sampling on critical components and lot-level traceability recorded at receipt.
03
First Article & Process QC (IPQC)
First article confirmation before each run, followed by in-process checks covering torque logs, line checklists and station-level workmanship.
04
Functional Testing
100% electrical safety, power draw and sensor verification at in-line test fixtures, with over 40 design validation tests completed at platform qualification.
05
Final Inspection (FQC)
Finished-goods audit, random sampling, cosmetic check and packaging verification before release to outbound.
06
Corrective Action (CAPA)
Closed-loop 8D root-cause reporting, with quality analysis fed back to incoming inspection and process control criteria.
Regulatory Compliance & Country of Origin Disclaimer::

Product certifications and test reports are model-specific and may vary by manufacturing location and destination market. Certifications held by partner manufacturing entities are issued to that entity and to specific models; they do not transfer automatically to other products or facilities. Country of origin is determined per product under the applicable rules of the destination market and is confirmed in writing for each program before shipment. HisoAir coordinates testing with accredited third-party laboratories (including UL, ETL, CE, CB, RoHS and CARB) based on specific client programs and country-level regulatory standards.

VERIFIABLE OPERATIONAL PROOF

Real Factory Evidence

On-site operational photographs taken during audit visits, laboratory validation and pilot production batches at this facility.

Proof 01

Assembly Line Operation

Multi-station final assembly line for air treatment appliances during production run.—2022

Volume Production
Binh Duong, Vietnam
Verified Operational Record
Proof 02

Motor Plant

Adjacent motor manufacturing facility housing stator production and motor assembly lines.—2022

Component Manufacturing
Binh Duong, Vietnam
Verified Operational Record
Proof 03

CADR Test Chamber

Sealed chamber for particulate clean air delivery rate measurement.—2022

Laboratory Validation
Binh Duong, Vietnam
Verified Operational Record
Proof 04

Acoustic Test Room

Anechoic room for sound pressure measurement across product speed settings.—2022

Laboratory Validation
Binh Duong, Vietnam
Verified Operational Record
Proof 05

Reliability Test Equipment

Temperature and humidity chamber, salt spray, drop and vibration testing stations.—2022

Reliability Testing
Binh Duong, Vietnam
Verified Operational Record
Proof 06

Final Quality Inspection

FQC station performing finished-goods audit prior to packing.—2022

Production QC
Binh Duong, Vietnam
Verified Operational Record
Contaminant Engineering•3 min read

PFAS Water Filtration Technologies Explained: Carbon, Resin & RO

Key Takeaway:

PFAS reduction depends on the specific compounds present, treatment media, contact time, water chemistry, and system design. Activated carbon, ion exchange, and Reverse Osmosis address PFAS through different mechanisms.

PFAS are a large family of persistent fluorinated compounds that can occur in drinking-water supplies. Their treatment behavior varies significantly by molecular structure, chain length, functional group, concentration, and the chemistry of the source water.

Granular Activated Carbon (GAC) removes PFAS primarily through adsorption. It is generally more effective for many longer-chain PFAS, while shorter-chain compounds tend to break through more quickly. Carbon performance depends on media properties, Empty Bed Contact Time (EBCT), competing organic matter, loading, and replacement frequency.

Ion-exchange resins use charged functional sites to capture many PFAS compounds. Properly selected anion-exchange media can provide high capacity and may perform better than conventional activated carbon for some shorter-chain PFAS, although performance still depends on water chemistry and competing ions.

Reverse Osmosis (RO) uses membrane separation rather than adsorption. Properly designed RO systems can provide broad reduction across many PFAS compounds as well as dissolved salts and other contaminants. Unlike carbon or resin, however, RO also produces a concentrate stream that must be managed.

No single technology should be selected from a PFAS label alone. System design should consider which PFAS compounds are present, their concentrations, required reduction targets, flow rate, media life, and the applicable third-party certification or validation requirements.

HisoAir Water Technical Series
Product Discovery•3 min read

How to Choose an Under-Sink Water Purifier for Modern Kitchens

Key Takeaway:

Match the treatment technology to your water quality first, then evaluate cabinet space, faucet configuration, flow rate, drain and power requirements, and filter replacement needs.

Choosing an under-sink water purifier starts with water chemistry. Carbon filtration is well suited to chlorine, taste, odor, and many organic contaminants, while Reverse Osmosis is more appropriate when dissolved salts, fluoride, nitrates, or broader dissolved contaminants need to be reduced.

For compact kitchens, tankless RO systems eliminate the conventional storage tank and can significantly reduce the space required under the sink. However, membrane capacity stated in GPD does not directly equal faucet flow. When comparing systems, check the actual dispensing flow rate, inlet-pressure requirement, recovery ratio, and whether a booster pump is required.

Installation architecture also matters. Many RO systems require a drain connection, electrical power, and either a dedicated drinking-water faucet or a compatible multi-function faucet. High-flow carbon systems can often connect directly to the existing cold-water line with a simpler installation, but pressure drop and available faucet flow should still be verified.

RO also removes much of the naturally occurring dissolved mineral content. Where taste or mineral balance is a priority, a post-RO remineralization stage can be added. Filter life should be evaluated by both rated capacity and local water quality rather than replacement time alone.

The right system is therefore not simply the smallest or highest-GPD model. It is the configuration that matches the target contaminants, available cabinet space, desired faucet setup, peak dispensing demand, and maintenance expectations.

HisoAir Water Technical Series
Water Quality•2 min read

What Does TDS Mean in Drinking Water? Measurement vs Contaminant Reality

Key Takeaway:

A TDS meter estimates the overall concentration of dissolved ionic substances from electrical conductivity. It cannot identify specific contaminants or determine whether water is chemically safe.

Total Dissolved Solids (TDS) refers to the combined concentration of dissolved substances in water. Most handheld TDS meters do not measure TDS directly. Instead, they measure electrical conductivity (EC) and convert that reading into an estimated parts-per-million (ppm) value.

This means a TDS reading can indicate how much dissolved ionic material is present, but not what that material actually is. Calcium, magnesium, sodium, nitrates, and other dissolved ions can all contribute to conductivity, yet a simple TDS meter cannot distinguish between them.

TDS meters are also not suitable for detecting trace contaminants such as PFAS, many VOCs, pesticides, pharmaceuticals, or disinfection byproducts. These substances may be present at concentrations far below the level needed to noticeably change electrical conductivity.

A low TDS reading therefore does not guarantee safe drinking water, and a higher TDS reading does not automatically indicate contamination. Water-treatment decisions should be based on laboratory testing for specific contaminants of concern rather than TDS alone.

HisoAir Water Technical Series
Technology Selection•2 min read

RO vs UF Water Filtration: Understanding Pore Sizes & Dissolved Minerals

Key Takeaway:

Ultrafiltration can reduce bacteria, turbidity, and suspended particles while retaining most naturally occurring dissolved minerals. Reverse Osmosis provides much broader reduction of dissolved salts and smaller contaminants.

Ultrafiltration (UF) typically uses hollow-fiber membranes with pore sizes in the approximate 0.01–0.1 micron range. These membranes physically retain turbidity, suspended solids, colloids, and many microorganisms while allowing dissolved minerals and salts to remain in the water.

Reverse Osmosis (RO) operates at a much finer separation level. Unlike UF, RO can substantially reduce dissolved ions such as sodium, calcium, fluoride, nitrates, and other contributors to total dissolved solids (TDS). This makes RO more suitable when dissolved-salt reduction is a primary treatment objective.

UF generally requires less system pressure and produces little or no continuous concentrate stream in many point-of-use configurations. RO typically requires greater pressure and produces a reject-water stream, but delivers broader contaminant reduction.

For water with acceptable TDS and mineral content, UF can be a simpler mineral-retaining treatment option. Where dissolved salts, fluoride, nitrates, or broader dissolved contaminants are a concern, RO is generally the more appropriate technology.

HisoAir Water Technical Series
Technology Selection•4 min read

Carbon Block vs Reverse Osmosis: Which Fits Your Need?

Key Takeaway:

Choose RO for dissolved inorganic salts and heavy metals; choose Carbon Block for chemical taste/odor, no wastewater, and high line-pressure flow.

Reverse Osmosis (RO) and Carbon Block filtration represent two fundamentally different treatment methods: membrane separation and adsorption. Understanding these differences helps determine which technology is better suited to a specific water-quality requirement.

Reverse Osmosis uses a semi-permeable membrane with pore sizes of approximately 0.0001 microns. It can significantly reduce dissolved inorganic contaminants such as TDS, fluoride, nitrates, and certain heavy metals. Because water must be forced through the membrane, RO systems require sufficient pressure or a booster pump and generate a concentrated wastewater stream.

Carbon Block filtration relies primarily on adsorption through compressed activated carbon, commonly with nominal pore sizes around 0.5–5 microns. It is highly effective for chlorine, chloramines, VOCs, taste, and odor, while allowing substantially higher direct-flow rates without producing wastewater.

From an operating perspective, Carbon Block systems are generally simpler, require less energy, and avoid the water loss associated with RO. RO involves higher system complexity and operating cost, but provides substantially broader reduction of dissolved contaminants that Carbon Block alone cannot address.

HisoAir Water Technical Series

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